Originally Posted By OregonMouse
I would agree about the Groundhogs except that they don't go in any farther than any other stake when they hit a rock or root. If they're only 1/3 to 1/2 way in, they are no more effective than the Ti needle stakes.
That isn't quite accurate because surface area is what determines holding power assuming the same depth and length, which would effect the torque upon the stake. Y stakes will always have more surface area than spikes and most V's.